Improvement in watch-case springs



l. C. CWLES.

Watch-Case Springs.

No.149,839, Patented Apri|2`1,1a74.

if@ f UNITED STATES PATENT DEEICE. f

IRVING O. COWLES, OF SYRAOUSE, NEW YORK.

IMPROVEMENT IN WATCH-CASE SPRINGS.

Specification forming part of Letters Patent No. 149,839, datedApi-i121, 1874; application filed October 11, 1873.

To all whom it may concern:

Beit known that I, IRVING C. CowLEs, of the city of Syracuse, Onondagacounty, State of New York, have invented a Lifting-Spring for aWatch-Oase, of which the following is a specification The object of myinvention is to produce an adjustable lifting-spring for raising thecase ot' a watch, of such a character that it will perform the workrequired, and may be easily adjusted to any watch without drillingadditional holes in the case, and which, it worn out or broken, maybeeasily replaced. This is accomplished by the combination of the shankb, curved to lit the rim A, with slot c, and spring a, as shown in theaccompanying drawings, Figs. l and 2. The spring is illustrated more indetail, and its adjustability and adaptation more clearly shown in thedrawing, Figs. 2 and 3. Fig. 2 represents a watch-case with the springin place, and a portion of the rim removed to show the parts.

B is the case to be raised; A, the rim. b is a part of this invention,and is the shank having a slot, c, of sufficient length and depth toreceive the spring a, and is held in its place by screw d. The spring ais fitted so as to work closely in the slot o, and to rise a trifleabove the sides of the shank, and is held in place by being drawn upagainst the case by the screw d.

To adjust the spring to a Watch requiring a longer or shorter spring, itis only necessary to inove the spring a to the right or lel't in slot cas far as necessary. WVhen the spring is adjusted in its place, thescrew-hole in the shank b will correspond with the screw-hole in theriin A.

Fig. 3 shows a cross-section of rim A with spring inserted in place, therim A being cut at dotted line x a'.

I claim as my invention- A lift-spring for watch-cases consisting of thesolid curved shank b, having a recess, c, and clamp-screw d, incombination with the spring a., substantially as described and shown.

IRVING C. OOWLES.

Witnesses E. E. EWERs, WM. CowIE.

